Mohs hardness scale test
AR231
BS 812:117 | BS 1377:3
The set consists of 10 reference minerals: Talcum, Gypsum, Calcite, Fluorite, Apatite, Feldspar,Quartz, Topaz, Corundum and Diamond.
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The set consists of 10 reference minerals: Talcum, Gypsum, Calcite, Fluorite, Apatite, Feldspar,Quartz, Topaz, Corundum and Diamond.